Hi,
I'm trying to modify the attached patch...

I'm trying to add a pink noise generator to a DAC which is no problem, but it instantly feeds back in to the Spectrum Analyser. Is there any way to separate them so I can have Pink Noise coming out of the patch and the Spectrum Analyser monitoring what comes in the analogue input (from a mic source) not the outgoing pink noise?

This is in order to embed it into an app for speaker tests and room analysis etc...

Any help would be much appreciated.

http://www.pdpatchrepo.info/hurleur/Spect.pd

If you don't want to analyze the pink noise you're sending to the speakers, why do you need to do both speaker testing and room analysis simultaneously?
Maybe it's a stupid question, but I've no idea how you could separate what's going out from what's coming in, when both speakers and mic are in the same room..